Cita APA (7a ed.)

Mitford, N., & Law, J. (1973). Frederick the Great: Nancy Mitford. Picture research by Joy Law. Penguin Books.

Cita Chicago Style (17a ed.)

Mitford, Nancy, y Joy Law. Frederick the Great: Nancy Mitford. Picture Research by Joy Law. Harmondsworth, Middlesex, England: Penguin Books, 1973.

Cita MLA (8a ed.)

Mitford, Nancy, y Joy Law. Frederick the Great: Nancy Mitford. Picture Research by Joy Law. Penguin Books, 1973.